Toothbrush



FIG. 1 is a top, back, right side perspective view of a toothbrush showing our new design; and,

FIG. 2 is a back view thereof.

The broken lines are included for the purpose of illustrating portions of the toothbrush that are environmental or illustrative and that form no part of the claimed design. 

We claim the ornamental design for a toothbrush, as shown and described. 